package main

import (
	"github.com/gin-gonic/gin"
	"net/http"
)

type Option func(*gin.Engine)

var options = []Option{}

func Include(opts ...Option) {
	options = append(options, opts...)
}

//初始化
func Init() *gin.Engine {
	r := gin.Default()
	r.Use(Cors())
	//每个模块下的路由进行注册
	for _, opt := range options {
		opt(r)
	}
	return r
}

/**
解决跨域问题
*/
func Cors() gin.HandlerFunc {
	return func(c *gin.Context) {
		method := c.Request.Method
		origin := c.Request.Header.Get("Origin")
		if origin != "" {
			c.Header("Access-Control-Allow-Origin", "*") // 可将将 * 替换为指定的域名
			c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
			c.Header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization")
			c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Cache-Control, Content-Language, Content-Type")
			c.Header("Access-Control-Allow-Credentials", "true")
		}
		if method == "OPTIONS" {
			c.AbortWithStatus(http.StatusNoContent)
		}
		c.Next()
	}
}
